The new site, which was revealed to be in construction last week by the Iranian government, is much smaller than the existing Natanz enrichment facility, but is expected to use more efficient, modern technology. It is reportedly under a mountain near the city of Qom, one of the holiest cities in Shi’ite Islam, and an attack by Israel near the city would almost certainly provoke outrage.

I agree with retirethe empire's comment. How do you bomb someting that's inside a mountain? If anyone wanted to bomb this site, the time to do it was when it was under construction, not now. By not bombing it earlier, the US and Israel have, in practice, admitted that they do not have, and probably never have had, any intention of attacking Iran. I'm guessing that the claim is propaganda designed to divert people's attention away from that conclusion.

"why would MI6 leak that if it were really true?" maybe because Britain is the junior partner in any war and will be forced in if the united states goes along

"Moreover, I don't think the Saudis want to have a torrent of iranian missiles raining down on them in retaliation."
really ?why not ..the saudi regime is not a nation state its just a giant royal family with a bunch of people on it periphery who would rather have there own independent nation state than live under a religious monarchy especially the shia living right by all of the Wahhabi American oil fields

Look, all MI6 is good for these days is cutting and pasting dossiers from the Internet. Since Israel papers have been publishing these pathetic stories for years, it can't have been hard for some low-paid Eastern European employed on minimum wage at MI6 to Google Haaretz, JPost and Ynet for 'Israeli jet Saudi Arabia Iran'. A few more clicks and another world-class dossier is going out the door.